These easy and delicious peanut butter cookie bars with M&Ms are flaky and crispy on the top and chocolate and peanut filled on the inside. Such a decadent treat.
Preheat oven to 350 degrees. Lightly grease 8 inch square baking pan.
Whisk flour, baking powder, and salt. Set aside.
In a stand mixer, on medium speed, beat butter, sugar, and brown sugar until light and fluffy. Add peanut butter and mix well. Mix in the egg and vanilla.
Reduce mixer speed to low. Add the flour mixture a little at a time, mixing until almost blended. Stir in the M&Ms.
Pour batter into prepared pan. Bake 30-35 minutes, or until edges are lightly browned
Adapted from Bake or Break